motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 07:43:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions
qemu/hw/virtio
History
Stefan Hajnoczi 1436f32a84 virtio-pci: add virtio_pci_optimal_num_queues() helper 
Multi-queue devices achieve the best performance when each vCPU has a
dedicated queue. This ensures that virtqueue used notifications are
handled on the same vCPU that submitted virtqueue buffers.  When another
vCPU handles the the notification an IPI will be necessary to wake the
submission vCPU and this incurs a performance overhead.

Provide a helper function that virtio-pci devices will use in later
patches to automatically select the optimal number of queues.

The function handles guests with large numbers of CPUs by limiting the
number of queues to fit within the following constraints:
1. The maximum number of MSI-X vectors.
2. The maximum number of virtqueues.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200818143348.310613-4-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-27 08:29:13 -04:00
..
Kconfig virtio-mem: Paravirtualized memory hot(un)plug 2020-07-03 07:57:04 -04:00
meson.build meson: convert hw/virtio 2020-08-21 06:30:26 -04:00
trace-events virtio,acpi: features, fixes, cleanups. 2020-07-07 17:37:44 +01:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vhost-backend.c vhost-vdpa: introduce vhost-vdpa backend 2020-07-07 07:59:51 -04:00
vhost-scsi-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
vhost-stub.c vhost-user: simplify vhost_user_init/vhost_user_cleanup 2019-03-12 21:22:31 -04:00
vhost-user-blk-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
vhost-user-fs-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
vhost-user-fs.c qdev: Unrealize must not fail 2020-05-15 07:08:14 +02:00
vhost-user-input-pci.c qom: Drop parameter @errp of object_property_add() & friends 2020-05-15 07:07:58 +02:00
vhost-user-scsi-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
vhost-user-vsock-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
vhost-user-vsock.c virtio: add vhost-user-vsock base device 2020-06-12 10:17:06 -04:00
vhost-user.c Fix vhost-user buffer over-read on ram hot-unplug 2020-07-27 10:28:28 -04:00
vhost-vdpa.c vhost-vdpa :Fix Coverity CID 1430270 / CID 1420267 2020-07-27 10:28:28 -04:00
vhost-vsock-common.c vhost-vsock: add vhost-vsock-common abstraction 2020-06-12 10:17:06 -04:00
vhost-vsock-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
vhost-vsock.c vhost-vsock: add vhost-vsock-common abstraction 2020-06-12 10:17:06 -04:00
vhost.c vhost: implement vhost_force_iommu method 2020-07-03 07:57:04 -04:00
virtio-9p-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
virtio-balloon-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
virtio-balloon.c virtio-balloon: Replace free page hinting references to 'report' with 'hint' 2020-07-22 07:57:07 -04:00
virtio-blk-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
virtio-bus.c virtio: notify virtqueue via host notifier when available 2019-11-06 06:35:00 -05:00
virtio-crypto-pci.c virtio: Drop broken and superfluous object_property_set_link() 2020-07-22 07:57:07 -04:00
virtio-crypto.c qom: Change object_get_canonical_path_component() not to malloc 2020-07-21 16:23:43 +02:00
virtio-input-host-pci.c Include qemu/module.h where needed, drop it from qemu-common.h 2019-06-12 13:18:33 +02:00
virtio-input-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
virtio-iommu-pci.c qom: Put name parameter before value / visitor parameter 2020-07-10 15:18:08 +02:00
virtio-iommu.c virtio-iommu: Fix coverity issue in virtio_iommu_handle_command() 2020-07-13 14:36:08 +01:00
virtio-mem-pci.c virtio-mem-pci: force virtio version 1 2020-07-27 09:38:33 -04:00
virtio-mem-pci.h virtio-pci: Send qapi events when the virtio-mem size changes 2020-07-03 07:57:04 -04:00
virtio-mem.c meson: infrastructure for building emulators 2020-08-21 06:30:17 -04:00
virtio-mmio.c qdev: set properties with device_class_set_props() 2020-01-24 20:59:15 +01:00
virtio-net-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
virtio-pci.c virtio-pci: add virtio_pci_optimal_num_queues() helper 2020-08-27 08:29:13 -04:00
virtio-pci.h virtio-pci: add virtio_pci_optimal_num_queues() helper 2020-08-27 08:29:13 -04:00
virtio-pmem-pci.c qom: Put name parameter before value / visitor parameter 2020-07-10 15:18:08 +02:00
virtio-pmem-pci.h virtio-pci: Proxy for virtio-pmem 2019-07-04 17:00:32 -04:00
virtio-pmem.c qom: Change object_get_canonical_path_component() not to malloc 2020-07-21 16:23:43 +02:00
virtio-rng-pci.c virtio: Drop broken and superfluous object_property_set_link() 2020-07-22 07:57:07 -04:00
virtio-rng.c error: Eliminate error_propagate() with Coccinelle, part 1 2020-07-10 15:18:08 +02:00
virtio-scsi-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
virtio-serial-pci.c qdev: Convert uses of qdev_set_parent_bus() with Coccinelle 2020-06-15 22:05:08 +02:00
virtio.c virtio-pci: fix virtio_pci_queue_enabled() 2020-07-27 11:34:50 -04:00